Installation of a Sharp THU Wall-Mounted Heat Pump in Saint-Lambert
Find out how a rooftop Sharp THU heat pump installation turned a complex challenge into a showcase of innovation and customer delight!
Take a tour of the installation
Each number is a point we check on site. Switch between summer and winter to watch air and heat move.
In summer, the outdoor unit rejects the house's heat outside.
Generic illustration of this type of installation, not a survey of this job site. Tap a number.
Mounted level on a wall plate, high enough for the air to reach the whole room, with enough space around it to slide the filters out easily.
The refrigerant lines, the communication cable and the drain go through the wall in a single opening, sealed against water, cold air and insects.
Two insulated copper pipes connect the two units. Outside, a line cover can protect them from sun, knocks and weather.
A shut-off switch near the outdoor unit isolates it safely for service. It must stay accessible at all times.
The compressor and the fan. In heating mode it captures heat from the outdoor air, even in winter, and moves it inside.
On the ground or on the wall, it keeps the unit above accumulated snow. The unit stays clear and defrost water can drain away.
The fan needs to blow freely. Storage, a fence or a wall too close, and efficiency drops while noise goes up.
A Breathtaking Blend of Innovation and Customer Satisfaction
Meeting the Unique Demands of a Saint-Lambert Installation
When AirGreen, your trusted HVAC specialists in Montréal, undertook the challenge of installing a state-of-the-art Sharp THU wall-mounted heat pump in Saint-Lambert, the stakes were high, but so were our standards. Our recent project not only tested our technical acumen but also showcased our commitment to delivering tailor-made solutions that resonate with our clients' needs.
Project Overview: Navigating Complexity with Precision
The task was to mount the outdoor unit of a 12,000 BTU Sharp THU heat pump on the roof—a request from a client who prioritized aesthetics and functionality without compromising his living space. This installation was classified as medium difficulty, not just because of the placement but due to the intricate setup involved, including the introduction of brand-new piping to replace the old, faulty ones discovered during our meticulous preparatory assessments.
Why Sharp THU? An Unbeatable Choice
Choosing the Sharp THU was no coincidence. This model is a powerhouse, boasting ENERGY STAR® certification and impressive 24.0 SEER efficiency. With features like Plasmacluster technology, which actively neutralizes pathogens and allergens, and a robust 10-year warranty covering parts, labor, and compressor, the THU stands out as a top-tier choice for discerning homeowners. Its ability to provide 100% heating capacity down to -27°C ensures comfort even in the harshest Canadian winters.
Key Installation Challenges and Triumphs
One of the pivotal moments of this installation was positioning the external unit on the rooftop. This required not only technical know-how but also a creative approach to ensure stability and operational efficiency. Our team's expertise was further demonstrated through the seamless integration of the unit's rotating flap that swivels up to 180°, ensuring optimal air distribution.
Moreover, our commitment to excellence was reflected in our choice to replace the existing piping. The discovery of holes within the old pipes could have been overlooked, but at AirGreen, we believe in thoroughness, ensuring every component functions flawlessly.
Customer-Centric Approach: A Recipe for Success
The satisfaction expressed by our client was immense. Not only was he impressed by the efficiency and discretion of the installation, but he was also pleased with the air purification capabilities and the comprehensive warranty. His endorsement didn’t stop at mere words; he immediately recommended us to his neighbor, leading to another installation of the same model. This ripple effect of satisfaction underscores the trust and reliability that AirGreen brings to the table.
The Added Value of the Hydro-Québec Grant
Adding to the appeal of this installation is the $425 Hydro-Québec grant, which our client availed for selecting an energy-efficient model like the Sharp THU. This incentive not only made the decision more economically favorable but also aligned with our mission to promote sustainable and energy-efficient home heating solutions.
Conclusion: More Than Just an Installation
At AirGreen, every project is a story of unique challenges and bespoke solutions. Our installation in Saint-Lambert is a testament to our dedication to not just meeting but exceeding customer expectations through innovative technology, responsible practices, and a customer-first approach. Choose AirGreen for your next HVAC project, and experience a service that’s as reliable as the technology we install.
The big day, step by step
The main steps of this kind of job at AirGreen. Every house has its quirks: the estimate brings them out.
We look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
Model, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
Floors and furniture protected, wall plate position marked level, wall opening located.
A single opening, with the slope the drain needs to flow outside.
Set on a stand raised above the snow, with the clearances the manufacturer requires.
Connected, insulated and protected. The opening is then sealed against water, cold air and insects.
A dedicated circuit and an accessible disconnect near the outdoor unit.
Leak test, vacuum, then start-up and a check of heating and cooling.
Remote, modes, filters: we show you the essentials before we leave.
- The on-site estimateWe look at the room, the outside wall, the line route and where the outdoor unit will go. That is where the capacity gets chosen.
- The quoteModel, capacity and price, in writing. We also check whether the model qualifies for assistance programs.
- Getting readyFloors and furniture protected, wall plate position marked level, wall opening located.
- The wall openingA single opening, with the slope the drain needs to flow outside.
- The outdoor unitSet on a stand raised above the snow, with the clearances the manufacturer requires.
- Lines, cable and drainConnected, insulated and protected. The opening is then sealed against water, cold air and insects.
- The electrical workA dedicated circuit and an accessible disconnect near the outdoor unit.
- Tests and start-upLeak test, vacuum, then start-up and a check of heating and cooling.
- The walkthroughRemote, modes, filters: we show you the essentials before we leave.
What would it look like at your place?
Two quick checks with real numbers: what heat costs, and what your current heaters add up to in BTU/h.
Conversion: 1 W = 3.412 BTU/h. An indication, not a load calculation: baseboards and furnaces are often stronger than the real need, and they can stay as backup. AirGreen confirms the capacity on site.
Four mistakes we do not make
Flip each card to see what we do instead.
Your own project, step by step
What to do, season by season
Three habits per season for this unit. They take a few minutes and prevent many calls.
- Clean the indoor unit's filters.
- Clear leaves and debris left on the outdoor unit by winter.
- Test cooling before the first hot days.
- Clean the filters more often when the unit runs a lot.
- Keep plants away from the outdoor unit.
- Check that no water drips from the indoor unit.
- Rake the leaves around the outdoor unit.
- Test heating before the first cold days.
- Book periodic maintenance before winter.
- Keep snow away from the stand and the front of the unit.
- Let the unit defrost: it is normal.
- Never hit the ice on the fins; call us if the unit stays iced up.
Is your home ready?
Check what applies at your place. A "no" is not a refusal: it is what we sort out during the estimate.
Four statements: true or false?
It all comes down to details you have just seen.
1. In heating mode, the outdoor unit can produce water.
During defrost cycles. That water must drain away without forming ice.
2. You pick the capacity with a simple square-footage rule.
Windows, insulation, orientation and how the room is used all count. Capacity is chosen on site.
3. A multi-zone connects several indoor heads to a single condenser.
One head per room, all on the same condenser. Each room keeps its own temperature.
4. The disconnect can sit behind the patio furniture.
It must stay accessible: it is what shuts the unit off for service.
0 / 4 right answers
What people ask us about this kind of work
Does a wall-mounted heat pump heat in winter?
Wall-mounted or multi-zone: how do I choose?
Where does the outdoor unit go?
Are there grants?
Do I need a permit?
How cold can it heat?
How much can I save?
How is the LogisVert assistance calculated?
Is it noisy?
The outdoor unit is covered in ice: is that normal?
Does AirGreen hold the required licences?
Is the estimate free?
No question matches. Write to us: we answer.
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Every house has its constraints. We see them before we install.
The on-site estimate is free and the quote follows within 24 hours.
Text and photo: a real AirGreen Climatisation & Chauffage job. The diagrams are generic illustrations of the type of installation, not a survey of this job site. Sources of the added figures: airgreen.ca product pages (NEEP / AHRI performance), Hydro-Québec (Heat pumps page, LogisVert, read on 13 October 2026), Régie de l’énergie (rate D as of 1 April 2026).